#define _CRT_SECURE_NO_WARNINGS 1
#include<stdio.h>
int main() {
	int year,month = 0;
	int day = 0;
	while(scanf("%d %d", &year, &month) != EOF) {
		if (month == 2) {
			if (year % 4 == 0 && year % 100 != 0 || year % 400 == 0) {
				printf("29\n");
			}
			else printf("28\n");
		}
		switch (month) {
		case 1:
		case 3:
		case 5:
		case 7:
		case 8:
		case 10:
		case 12:
			printf("31\n");
			break;
		case 4:
		case 6:
		case 9:
		case 11:
			printf("30\n");
			break;
		}
	}
	return 0;
}